This is because JBoss optimizes in-VM communication whether you're using Local or Remote interfaces. JBoss detects whether you are in-VM and does the appropriate thing.
I hope all this Remote and Local crap is removed in 3.0. There really is no reason for it. BTW, great work Jon! Bill > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Jon Barnett > Sent: Saturday, June 21, 2003 12:30 PM > To: [EMAIL PROTECTED] > Subject: [JBoss-user] Performance gains using local interfaces in > servlets > > > We did some additional testing by tweaking web applications to use local > interfaces to EJBs. These comparisons were made to our performance tests > conducted earlier > (http://www.amitysolutions.com.au/downloads/JBoss_optimizations.pdf) > > We found that they had little impact over the optimizations that JBoss > performs internally. We saw perhaps a 1 ms decrease in the response time > average, using the IBM SDK 1.4.0 with an optimized JBoss 3.2.0. > > In our test applications, we built the servlets so that they obtained > references to EJBs only at initialization. So that nullified the > PortableRemoteObject operation disadvantage. In a production system, you > don't expect the references to change so we feel it is a reasonable > performance tweak. > > Therefore, we were only measuring the speed improvement of passing by > reference. With small amounts of data transferred between EJBs and > servlets on a per transaction basis, the gain is small if not negligible > from our results. If you were consistently transferring large blocks of > data such as BLOBs for pictures, you might see more substantial > performance gains. Images appeared to display faster when we inspected > some pages incorporating BLOB derived pictures, although we would need to > measure this to obtain a proper understanding of the gain. > > >From a memory perspective, we saw a 4Mb reduction in the virtual size > (VSZ) and a 1.5Mb reduction in the resident in memory footprint (RSS) > using the IBM SDK 1.4.0 with an optimized JBoss 3.2.0. > > Hope that is of use. > ------------------------------------------------------- This SF.Net email is sponsored by: INetU Attention Web Developers & Consultants: Become An INetU Hosting Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission! INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-user
